.mobile-drawer-backdrop,
.mobile-drawer {
  display: none;
}

body.mobile-drawer-open {
  overflow: hidden;
}

@media (max-width: 860px) {
  :root {
    --header-h: 64px;
  }

  .site-header {
    grid-template-columns: 46px 1fr 46px;
    padding: 0 var(--layout-gutter);
  }

  .mobile-menu-button {
    display: grid;
    grid-column: 1;
    grid-row: 1;
  }

  .brand {
    grid-column: 2;
    justify-self: center;
  }

  .brand-logo {
    height: 34px;
    max-width: min(190px, 56vw);
  }

  .main-nav,
  .theme-toggle {
    display: none;
  }

  .header-actions {
    grid-column: 3;
  }

  .mobile-menu-button,
  .profile-button {
    width: 40px;
    height: 40px;
    border-radius: 14px;
  }

  .profile-button {
    border-radius: 50%;
  }

  .profile-button__avatar {
    border-radius: 50%;
    object-fit: cover;
  }

  .mobile-drawer-backdrop {
    position: fixed;
    inset: 0;
    z-index: 70;
    background: rgba(0, 0, 0, .38);
    backdrop-filter: blur(10px);
    opacity: 0;
    transition: opacity .22s ease;
  }

  .mobile-drawer-backdrop[data-visible="true"] {
    display: block;
    opacity: 1;
  }

  html[data-theme="light"] .mobile-drawer-backdrop {
    background: rgba(52, 51, 96, .18);
  }

  .mobile-drawer {
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    z-index: 75;
    width: min(86vw, 342px);
    max-width: calc(100vw - 42px);
    display: flex;
    flex-direction: column;
    gap: 24px;
    padding: calc(env(safe-area-inset-top, 0px) + 22px) 18px 22px;
    color: var(--text);
    border-right: 1px solid var(--border);
    border-radius: 0 28px 28px 0;
    background: linear-gradient(180deg, rgba(9, 9, 14, .82), rgba(9, 9, 14, .54));
    box-shadow: 24px 0 80px rgba(0, 0, 0, .36), inset -1px 0 0 rgba(255, 255, 255, .06);
    backdrop-filter: blur(20px) saturate(1.22);
    overflow-y: auto;
    transform: translateX(-108%);
    transition: transform .24s ease;
  }

  .mobile-drawer[data-visible="true"] {
    display: flex;
    transform: translateX(0);
  }

  html[data-theme="light"] .mobile-drawer {
    background: linear-gradient(180deg, rgb(243 213 255 / 82%), rgb(226 250 255 / 62%));
    box-shadow: 24px 0 76px rgba(58, 38, 78, .22), inset -1px 0 0 rgba(255, 255, 255, .58);
  }

  .mobile-drawer__top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
  }

  .mobile-drawer__title {
    color: var(--text);
    font-size: 20px;
    line-height: 1;
    font-weight: 1000;
    letter-spacing: -.04em;
  }

  .mobile-drawer__close {
    width: 38px;
    height: 38px;
    display: grid;
    place-items: center;
    color: var(--text-soft);
    border: 1px solid var(--border);
    border-radius: 14px;
    background: var(--surface-soft);
    font-size: 24px;
    line-height: 1;
  }

  .mobile-drawer__theme {
    display: flex;
    justify-content: center;
  }

  .mobile-drawer .theme-toggle {
    display: inline-grid;
  }

  .mobile-drawer__section {
    display: grid;
    gap: 12px;
  }

  .mobile-drawer__section h3 {
    margin: 0;
    color: var(--text);
    font-size: 13px;
    line-height: 1;
    font-weight: 1000;
    letter-spacing: .06em;
    text-transform: uppercase;
  }

  .mobile-drawer__list {
    display: grid;
    gap: 10px;
  }

  .mobile-drawer__room,
  .mobile-drawer__empty {
    min-height: 44px;
    display: flex;
    align-items: center;
    padding: 11px 13px;
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 16px;
    background: rgba(255, 255, 255, .075);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, .06);
    font-size: 14px;
    font-weight: 850;
    line-height: 1.2;
    text-decoration: none;
  }

  html[data-theme="light"] .mobile-drawer__room,
  html[data-theme="light"] .mobile-drawer__empty {
    background: rgba(255, 255, 255, .46);
  }

  .mobile-drawer__room--active {
    background: linear-gradient(90deg, rgba(78, 129, 255, .24), rgba(191, 42, 255, .18));
    border-color: rgba(191, 42, 255, .30);
  }

  .mobile-drawer__room--closed {
    opacity: .72;
    filter: saturate(.62);
  }

  .mobile-drawer__empty {
    color: var(--muted);
    font-weight: 750;
  }
}